From: Julien Thierry <julien.thierry@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, rostedt@goodmis.org,
marc.zyngier@arm.com, yuzenghui@huawei.com,
wanghaibin.wang@huawei.com, james.morse@arm.com,
will.deacon@arm.com, catalin.marinas@arm.com,
mark.rutland@arm.com, liwei391@huawei.com,
Julien Thierry <julien.thierry@arm.com>
Subject: [PATCH v4 2/8] arm64: irqflags: Pass flags as readonly operand to restore instruction
Date: Tue, 11 Jun 2019 10:38:07 +0100 [thread overview]
Message-ID: <1560245893-46998-3-git-send-email-julien.thierry@arm.com> (raw)
In-Reply-To: <1560245893-46998-1-git-send-email-julien.thierry@arm.com>
Flags are only read by the instructions doing the irqflags restore
operation. Pass the operand as read only to the asm inline instead of
read-write.
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
---
arch/arm64/include/asm/irqflags.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/irqflags.h b/arch/arm64/include/asm/irqflags.h
index 62996318..9c93152 100644
--- a/arch/arm64/include/asm/irqflags.h
+++ b/arch/arm64/include/asm/irqflags.h
@@ -119,8 +119,8 @@ static inline void arch_local_irq_restore(unsigned long flags)
__msr_s(SYS_ICC_PMR_EL1, "%0")
"dsb sy",
ARM64_HAS_IRQ_PRIO_MASKING)
- : "+r" (flags)
:
+ : "r" (flags)
: "memory");
}
--
1.9.1
next prev parent reply other threads:[~2019-06-11 9:38 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-11 9:38 [PATCH v4 0/8] arm64: IRQ priority masking and Pseudo-NMI fixes Julien Thierry
2019-06-11 9:38 ` [PATCH v4 1/8] arm64: Do not enable IRQs for ct_user_exit Julien Thierry
2019-06-11 12:45 ` Mark Rutland
2019-06-11 9:38 ` Julien Thierry [this message]
2019-06-11 12:46 ` [PATCH v4 2/8] arm64: irqflags: Pass flags as readonly operand to restore instruction Mark Rutland
2019-06-11 9:38 ` [PATCH v4 3/8] arm64: irqflags: Add condition flags to inline asm clobber list Julien Thierry
2019-06-11 12:52 ` Mark Rutland
2019-06-11 9:38 ` [PATCH v4 4/8] arm64: Fix interrupt tracing in the presence of NMIs Julien Thierry
2019-06-11 9:38 ` [PATCH v4 5/8] arm64: Fix incorrect irqflag restore for priority masking Julien Thierry
2019-06-11 9:38 ` [PATCH v4 6/8] arm64: irqflags: Introduce explicit debugging for IRQ priorities Julien Thierry
2019-06-11 9:38 ` [PATCH v4 7/8] arm64: fix kernel stack overflow in kdump capture kernel Julien Thierry
2019-06-11 9:38 ` [PATCH v4 8/8] arm64: Allow selecting Pseudo-NMI again Julien Thierry
2019-06-11 13:28 ` [PATCH v4 0/8] arm64: IRQ priority masking and Pseudo-NMI fixes Marc Zyngier
2019-06-21 10:27 ` Catalin Marinas
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